Graph theory .. on Wikipediahttp://en.wikipedia.org/wiki/Graph_theoryGraph theory .. on Wikipedia
In mathematics and computer science, graph theory is the study of graphs, which are mathematical structures used to model pairwise relations between objects.

Paperkit : free printable graph paper templatehttp://paperkit.net/Paperkit : free printable graph paper template
With Paperkit you can easily generate online the exact type of graph paper (grid paper) that you need. Use the toolbar to adjust the settings.
You have full control over spacing between grid lines, margin size, stroke color and width as well as paper size. A live preview will help you evaluate your design.
There are five formats available: A4, A3, legal, tabloid and letter. You can use units that you are comfortable with (millimeters or inches).

ChartGohttp://www.chartgo.com/index.jspCreate a graph online quickly. Create bar graphs, line graphs or pie charts.
Simply choose your settings, paste your data in the Chart data area and hit the create button. Visit the menu section if you need more specific chart settings. You can also use and modify existing graphs from the graphing example section.

Google Chart API - Chart Generatorhttp://www.jonwinstanley.com/charts/Google Chart API - Chart Generator
This generator uses the Google Charts API to produce crisp and clear graphs that can be inserted into web based documents via a hyper link or saved as a flat image file.

Google Image Chart Creatorhttp://bit.ly/oQCm3qGoogle Image Chart Creator: Create and Embed a Variety of Graphs and Charts
Google Image Chart Creator is a free web tool provided to you by Google. It lets you create a variety of graphs by entering data points. In addition to plotting the data, it lets you customize various aspects of the graphs such as colors and margins.
When you first visit the site you view thumbnails of different types of graphs that you can select from.

Fake Graph Generatorhttp://sporkforge.com/misc/fake_graph.phpFake Graph Generator
Use this fake graph generator to support your arguments on the internet. Simply specify the graph title and axis labels, then describe the graph lines you want drawn - you may have up to three. You also have the option of displaying a legend describing the graphed quantities.

How to make searchable, Web-based Google chartshttp://bit.ly/m3YQWlHow to make searchable, Web-based Google charts
A rise in free tools, however, has made it easier to make interactive graphs in charts, whether you’re a designer, developer, Web producer or hobbyist. The Google Visualization API, for instance, gives you options without making the work too complicated.
I’ve created a tutorial below to help you make simple, Web-based Google charts. (You can click on any of the screenshots to go to a larger version.) In the first example, we’ll craft an interactive bar chart that compares the numbers of tornado-related deaths in the United States throughout the past four years.

JS Charts | Free downloadhttp://www.jscharts.com/JS Charts | Free download
JS Charts is available free for both non-commercial and commercial purposes.
JS Charts is a free JavaScript based chart generator that requires little or no coding. With JS Charts drawing charts is a simple and easy task, since you only have to use client-side scripting (i.e. performed by your web browser). No additional plugins or server modules are required. Just include our scripts, prepare your chart data in XML or JavaScript Array and your chart is ready!
Our online editor, that has an easy to use interface, enables you to create highly customized charts in minutes, and then export them (upload the sources to your server) or get the embedding code (hosted version).

chartAllhttp://www.chartall.com/chartAll
Once registered go to the "Create a new Chart" wizard and follow 3 simple step
Registration is free and anonymous, and enables you to save and edit your charts, make them private, link to them from your web pages or share them to everybody or to some user groups.
Saved charts can also be accessed from your Google Homepage using our Google Gadget

Welcome to our graph of our favourite foods (Wiki)http://favouritesgraph.wikispaces.com/Welcome to our graph of our favourite foods (Wiki)
We are doing lots of graphing in our classroom. When we made a graph of our favourite foods, the clear winner was pizza. We wondered whether other people felt the same way as we did. Could you help us find out by adding your name and where you are from in the correct column below? Just click on "Edit this Page", then put the cursor in the correct place on the page and type in your name and where you are from.

Search statistics and watch it move with Gapminderhttp://www.gapminder.org/Search statistics through Google and watch it move with Gapminder
In a web browser or free download software .... this application will completely change your views on graphs .... brilliant
Google Subscribed Links makes it possible to search deep into Gapminder's moving graphs visualizing world development.

Presentation by Hans Roslinghttp://www.ted.com/tedtalks/tedtalksplayer.cfm?key=hans_roslingIf you want to see the most amazing use of graphs ... that you've probably ever seen ... then have a look at this Presentation by Hans Rosling
Video online .... brilliant .. and highly motivating to want to be really creative with graphs.
Hans Rosling is professor of international health at Sweden's world-renowned Karolinska Institute, and founder of Gapminder, a non-profit that brings vital global data to life. With the drama and urgency of a sportscaster, he debunks a few myths about the "developing" world. (Recorded February, 2006 in Monterey, CA.)
The PowerPoints themselves are downloadable from http://www.gapminder.org/

Meet the Graphs (uses Excel .. speadsheets)http://www.teachersfirst.com/unitlist.cfmMeet the Graphs (uses Excel .. speadsheets)
This interactive TeachersFirst lesson introduces students to bar and pie graphs using a sample spreadsheet.
Students can enter their observations, then watch to see how the different graphs represent their data.
The lesson includes teacher instructions, an introduction that can be presented using powerpoint or the web, and downloadable spreadsheet file.
Aligned to NCTM (USA) standards.

Create a Graph Onlinehttp://nces.ed.gov/nceskids/createagraph/Create a Graph Online
Here you will find five different graphs and charts for you to consider. Maybe it will help explain what you are trying to show. Use homework problems, things you have a special interest in, or use some of the numbers you find elsewhere on this site.

Furbles (Windows and Mac)http://www.furbles.co.uk/Furbles is an interactive probability and statistics application. It generates populations of creatures (such as the one on the right) with various attributes. They can self-organise into statistical representations of themselves, and a 'Furble Lottery' function allows one furble to be selected at random from among the population.
The application is designed to be Interactive Whiteboard friendly, and it targeted for use with Key Stages 2 and 3, though it may also be useful with Key Stage 1.

HandyGraph free blank graphshttp://www.handygraph.comSoftware to create blank graphs, grids, and number lines within Microsoft Word. Whenever you want to draw graphs by hand, HandyGraph can provide the template.
You can make custom axes and grids, and integrate them with the text of your document. (It can make graph paper too.)
Download a free copy and give it a try. If you like it, register your copy for only US$21.95.

Charts and Graphs : web links and activitieshttp://www.42explore.com/graphs.htmCharts and Graphs : web links and activities
A graph is a chart or drawing that shows the relationship between changing things.
They are a diagram displaying the relationship between numbers or amounts. Common graphs use bars, lines, or parts of a circle to display data.
A graph or chart is used to present facts in visual form. They are a drawing that displays the relative sizes of numerical quantities. A graph is one of the easiest ways to compare numbers.

Graph Paper!http://www.mathematicshelpcentral.com/graph_paper.htmYou just used your last sheet of graph paper, and you've got plenty more work to do! When the bookstore is out, or it's 2:00 in the morning, how do you finish your homework? I print mine out anytime I need it. You are welcome to download my graph paper to your computer and print as many copies as necessary.

EZ Graphhttp://zonalandeducation.com/ezGraph/ezGraph.htmlHere is Zona Land's graphics calculator, EZ Graph. With it you should be able to graph almost any polynomial, rational, exponential, logarithmic, or trigonometric function. It will allow you to enter variables into your function definition so that you can see the effect of changing coefficients easily.

Collecting, Graphing, Analyzing Data : Lesson Planhttp://www.pics4learning.com/lessonplan_details.php?id=m07Collecting and Analyzing Data
Objective - Each group of students will collect and interpret data for a specific question and create a multimedia presentation to present their findings to others.
This lesson would be a great activity to do as a part of a unit on graphs.